Same word as ill-bred:

bad-mannered, barbaric, bearish, cantankerous, churlish, cloddish, clodhopping, clownish, clumsy, coarse, countrified, gross, gruff, ill-bred, ill-mannered, impolite, inurbane, loud, loutish, lowbred, oafish, ornery, out-of-line, out-of-order, provincial, rough, rude